Testing middleware

middleware_spec.rb

require 'rails_helper'


describe Rack::MyMiddleware do
  let(:app) { proc { [200, {}, ['Hello Dave']] } }
  let(:stack) { described_class.new(app) }
  let(:request) { Rack::MockRequest.new(stack) }

  context 'A POST request' do
    #NOTE TIL = this is how I post all the things
    let(:response) { request.post('/' , opts={
                                    :input => "{ 'foo' : 'bar'}}",  #NOTE: :input is the raw input 
                                    'action_dispatch.request.request_parameters' => { 'foooo' => 'baaaar'} 
                                    #NOTE: the above is input that's ready after http://api.rubyonrails.org/classes/ActionDispatch/Http/Parameters.html has had it's way with it.
                                    #checkout https://github.com/rack/rack/blob/master/lib/rack/mock.rb
                                    #any strings added to opts get added to 'env'
                                  })}

    it 'does all the things!' do
      #TODO: All the things!
      expect(response.headers).to_not be nil
    end
  end
end